Schweitzer Engineering Laboratories SEL-351S - Setting ELOP = Y or Y1; Setting ELOP = Y; Setting ELOP = N

4-2 Loss-of-Potential, Load Encroachment, and Directional Element Logic Date Code 20010112
SEL-351S Instruction Manual
/RVVRISRWHQWLDOLVGHFODUHG5HOD\:RUGELW/23 ORJLFDOZKHQDGURSLQ9

LV
GHWHFWHGZLWKQRFRUUHVSRQGLQJFKDQJHLQ,

RU,

,IWKH/23FRQGLWLRQSHUVLVWVIRUF\FOHVLW
ODWFKHVLQ/23UHVHWV5HOD\:RUGELW/23 ORJLFDOZKHQ9

UHWXUQVDERYH9VHFRQGDU\
DQG
9

LVOHVVWKDQ9VHFRQGDU\Z\HFRQQHFWHGYROWDJHV
7KHORVVRISRWHQWLDOHQDEOHVHWWLQJ(/23GRHVQRWHQDEOHRUGLVDEOHWKH/23ORJLF,WMXVW
URXWHVWKH/235HOD\:RUGELWWRGLIIHUHQWORJLFDVVKRZQLQ)LJXUHDQGH[SODLQHGLQWKH
UHPDLQGHURIWKLVVXEVHFWLRQ
Setting ELOP = Y or Y1
,IVHWWLQJ(/23 <RU<DQGDORVVRISRWHQWLDOFRQGLWLRQRFFXUV5HOD\:RUGELW/23DVVHUWV
WRORJLFDOQHJDWLYHVHTXHQFHYROWDJHSRODUL]HG]HURVHTXHQFHYROWDJHSRODUL]HGDQGSRVLWLYH
VHTXHQFHYROWDJHSRODUL]HGGLUHFWLRQDOHOHPHQWVDUHGLVDEOHGVHH)LJXUH)LJXUH
)LJXUHDQG)LJXUH7KHORVVRISRWHQWLDOFRQGLWLRQPDNHVWKHVHYROWDJHSRODUL]HG
GLUHFWLRQDOHOHPHQWVXQUHOLDEOH7KXVWKH\DUHGLVDEOHG7KHRYHUFXUUHQWHOHPHQWVFRQWUROOHGE\
WKHVHYROWDJHSRODUL]HGGLUHFWLRQDOHOHPHQWVDUHGLVDEOHGDOVRXQOHVVRYHUULGGHQE\FRQGLWLRQV
H[SODLQHGLQWKHIROORZLQJ6HWWLQJ(/23 <
GLVFXVVLRQ
,Q)LJXUHWKHDVVHUWLRQRI/23LVDQDGGLWLRQDOHQDEOHIRUWKHFKDQQHO,1FXUUHQWSRODUL]HG
GLUHFWLRQDOHOHPHQW7KLVGLUHFWLRQDOHOHPHQWLVQRWYROWDJHSRODUL]HG
,Q)LJXUHLIVHWWLQJ(/23 <DQG/23DVVHUWVNH\LQJDQGHFKRNH\LQJLQWKHSHUPLVVLYH
RYHUUHDFKLQJWUDQVIHUWULS3277ORJLFDUHEORFNHG
Setting ELOP = Y
$GGLWLRQDOO\LIVHWWLQJ(/23 <DQGDORVVRISRWHQWLDOFRQGLWLRQRFFXUV5HOD\:RUGELW/23
DVVHUWVWRORJLFDORYHUFXUUHQWHOHPHQWVVHWGLUHFWLRQIRUZDUGDUHHQDEOHGVHH)LJXUHDQG
)LJXUH7KHVHGLUHFWLRQIRUZDUGRYHUFXUUHQWHOHPHQWVHIIHFWLYHO\EHFRPHQRQGLUHFWLRQDO
DQGSURYLGHRYHUFXUUHQWSURWHFWLRQGXULQJDORVVRISRWHQWLDOFRQGLWLRQ
$VGHWDLOHGSUHYLRXVO\YROWDJHEDVHGGLUHFWLRQDOHOHPHQWVDUHGLVDEOHGGXULQJDORVVRISRWHQWLDO
FRQGLWLRQ7KXVWKHRYHUFXUUHQWHOHPHQWVFRQWUROOHGE\WKHVHYROWDJHEDVHGGLUHFWLRQDOHOHPHQWV
DUHDOVRGLVDEOHG%XWWKLVGLVDEOHFRQGLWLRQLVRYHUULGGHQIRUWKHRYHUFXUUHQWHOHPHQWVVHW
GLUHFWLRQIRUZDUGLIVHWWLQJ(/23 <
Setting ELOP = N
,IVHWWLQJ(/23 1WKHORVVRISRWHQWLDOORJLFVWLOORSHUDWHV5HOD\:RUGELW/23DVVHUWVWR
ORJLFDOIRUDORVVRISRWHQWLDOFRQGLWLRQEXWGRHVQRWGLVDEOHDQ\YROWDJHEDVHGGLUHFWLRQDO
HOHPHQWVDVRFFXUVZLWK(/23 <RU<RUHQDEOHRYHUFXUUHQWHOHPHQWVVHWGLUHFWLRQIRUZDUG
DVRFFXUVZLWK(/23 <